<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
      <div id="app">
          {{ msg}}
      </div>  
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.13/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:'#app',
            data:{
                msg:'你好'
            }
        })
        
    </script>
</body>
</html>